Preview gadget

Monitoring

Create assertion-based uptime health checks — HTTP(S), WebSocket, gRPC — under an unguessable siteId. No signup; the siteId is your secret.

Your siteId

This siteId is the only credential for its checks — save it. Anyone with it can view and edit; lose it and there is no recovery.

or load an existing one:

Email notifications

We send a one-time UUID to prove you control the address. It expires after 15 minutes. Challenge requests and confirmation attempts are rate-limited; the UUID is never returned by the API.

Add a health check

min (1–1440)
Assertions apply to HTTP; WS = handshake, gRPC = SERVING.

Checks